Noun glycol has 2 senses
  1. ethylene glycol, glycol, ethanediol - a sweet but poisonous syrupy liquid used as an antifreeze and solvent
    --1 is a kind of antifreeze
  2. diol, glycol, dihydric alcohol - any of a class of alcohols having 2 hydroxyl groups in each molecule
    --2 is a kind of alcohol
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